/
virtualnode_mutator.go
77 lines (64 loc) · 2.52 KB
/
virtualnode_mutator.go
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package appmesh
import (
"context"
"fmt"
appmesh "github.com/aws/aws-app-mesh-controller-for-k8s/apis/appmesh/v1beta2"
"github.com/aws/aws-app-mesh-controller-for-k8s/pkg/mesh"
"github.com/aws/aws-app-mesh-controller-for-k8s/pkg/webhook"
"github.com/pkg/errors"
"k8s.io/apimachinery/pkg/runtime"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
)
const apiPathMutateAppMeshVirtualNode = "/mutate-appmesh-k8s-aws-v1beta2-virtualnode"
// NewVirtualNodeMutator returns a mutator for VirtualNode.
func NewVirtualNodeMutator(meshMembershipDesignator mesh.MembershipDesignator) *virtualNodeMutator {
return &virtualNodeMutator{
meshMembershipDesignator: meshMembershipDesignator,
}
}
var _ webhook.Mutator = &virtualNodeMutator{}
type virtualNodeMutator struct {
meshMembershipDesignator mesh.MembershipDesignator
}
func (m *virtualNodeMutator) Prototype(req admission.Request) (runtime.Object, error) {
return &appmesh.VirtualNode{}, nil
}
func (m *virtualNodeMutator) MutateCreate(ctx context.Context, obj runtime.Object) (runtime.Object, error) {
vn := obj.(*appmesh.VirtualNode)
if err := m.designateMeshMembership(ctx, vn); err != nil {
return nil, err
}
if err := m.defaultingAWSName(vn); err != nil {
return nil, err
}
return vn, nil
}
func (m *virtualNodeMutator) MutateUpdate(ctx context.Context, obj runtime.Object, oldObj runtime.Object) (runtime.Object, error) {
return obj, nil
}
func (m *virtualNodeMutator) defaultingAWSName(vn *appmesh.VirtualNode) error {
if vn.Spec.AWSName == nil || len(*vn.Spec.AWSName) == 0 {
awsName := fmt.Sprintf("%s_%s", vn.Name, vn.Namespace)
vn.Spec.AWSName = &awsName
}
return nil
}
func (m *virtualNodeMutator) designateMeshMembership(ctx context.Context, vn *appmesh.VirtualNode) error {
if vn.Spec.MeshRef != nil {
return errors.Errorf("%s create may not specify read-only field: %s", "VirtualNode", "spec.meshRef")
}
mesh, err := m.meshMembershipDesignator.Designate(ctx, vn)
if err != nil {
return err
}
vn.Spec.MeshRef = &appmesh.MeshReference{
Name: mesh.Name,
UID: mesh.UID,
}
return nil
}
// +kubebuilder:webhook:path=/mutate-appmesh-k8s-aws-v1beta2-virtualnode,mutating=true,failurePolicy=fail,groups=appmesh.k8s.aws,resources=virtualnodes,verbs=create;update,versions=v1beta2,name=mvirtualnode.appmesh.k8s.aws,sideEffects=None,webhookVersions=v1beta1
func (m *virtualNodeMutator) SetupWithManager(mgr ctrl.Manager) {
mgr.GetWebhookServer().Register(apiPathMutateAppMeshVirtualNode, webhook.MutatingWebhookForMutator(m))
}